Maybe the reason why your plastic pots tend to lean forward is that they are made of a too "soft" material?
When I set out to create a fern wall in my garden, I also hanged the pots on a treillis similar to yours. But I couldn't find suitable pots in my GCs so asked my "potter in residence" wife to make "bespoke" clay pots.
There looks like a good sunny border under your trellis. While those pots may work for small plants, you're not really going to utilise the full potential of that growing space with them. Have you considered a flowering climber in the border (or a large planter) to cover the trellis? You could get colour and scent for a good part of the year with just a single climber.
I think the problem is more the size of the 'hook' than anything else. It's very wide. It would fit neatly round a 3 inch pole by the look of it, rather than trellis
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
They are actually sold as "balcony pots" to hang on the railing of a balcony, hence the wide hook - well spotted @Fairygirl! Here's the description:
Product information
Exclusively designed for use on balconies, thanks to its round, modern shape and minimalistic style this hanging pot is perfect for adding elegance and colour to display your plants on your balcony.
Outdoor
Features and benefits
Simplistic and practical, perfect for adding plants to your space.
"...this hanging pot is perfect for adding elegance and colour to display your plants on your balcony" I must say I totally disagree with this commercial blurb. Not my notion of "elegance". But... each to their own.
The little baskets, hay racks or troughs with the flat backs are probably a better solution for trellis or walls. They're also bigger, so more scope for planting. I've used them on fences too. Couple of screws into the support and then you hang them on it. You can get them in heavy duty plastic in various outlets.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
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in the page you mention you used cleats as a temporary solution, this might work for me… do you have a link to what you used and where can I buy them?
It would fit neatly round a 3 inch pole by the look of it, rather than trellis
I live in west central Scotland - not where that photo is...
Product information
Exclusively designed for use on balconies, thanks to its round, modern shape and minimalistic style this hanging pot is perfect for adding elegance and colour to display your plants on your balcony.
Features and benefits
I must say I totally disagree with this commercial blurb. Not my notion of "elegance".
But... each to their own.
You can get them in heavy duty plastic in various outlets.
I live in west central Scotland - not where that photo is...